X-Git-Url: https://de.git.xonotic.org/?a=blobdiff_plain;f=qcsrc%2Fwarpzonelib%2Fmathlib.qc;h=92b7ee14dd9080d2fac9d17527042f929cbe3433;hb=70b84d37e2cf1d5336c327cb43593024de2a2c6c;hp=b45c22a21ff210e785ac88827bafc337bb6320c1;hpb=35e8f712933b0ebf9b163b7289cf975825b33803;p=xonotic%2Fxonotic-data.pk3dir.git

diff --git a/qcsrc/warpzonelib/mathlib.qc b/qcsrc/warpzonelib/mathlib.qc
index b45c22a21..92b7ee14d 100644
--- a/qcsrc/warpzonelib/mathlib.qc
+++ b/qcsrc/warpzonelib/mathlib.qc
@@ -1,11 +1,7 @@
+#include "mathlib.qh"
 #if defined(CSQC)
-	#include "../dpdefs/csprogsdefs.qh"
-    #include "mathlib.qh"
 #elif defined(MENUQC)
 #elif defined(SVQC)
-	#include "../dpdefs/progsdefs.qh"
-    #include "../dpdefs/dpextensions.qh"
-    #include "mathlib.qh"
 #endif
 
 int fpclassify(float x)
@@ -18,25 +14,25 @@ int fpclassify(float x)
 		return FP_ZERO;
 	return FP_NORMAL;
 }
-int isfinite(float x)
+bool isfinite(float x)
 {
 	return !(isnan(x) || isinf(x));
 }
-int isinf(float x)
+bool isinf(float x)
 {
 	return (x != 0) && (x + x == x);
 }
-int isnan(float x)
+bool isnan(float x)
 {
 	float y;
 	y = x;
 	return (x != y);
 }
-int isnormal(float x)
+bool isnormal(float x)
 {
 	return isfinite(x);
 }
-int signbit(float x)
+bool signbit(float x)
 {
 	return (x < 0);
 }
@@ -82,9 +78,9 @@ float expm1(float x)
 vector frexp(float x)
 {
 	vector v;
-	v_z = 0;
-	v_y = ilogb(x) + 1;
-	v_x = x / exp2(v.y);
+	v.z = 0;
+	v.y = ilogb(x) + 1;
+	v.x = x / exp2(v.y);
 	return v;
 }
 int ilogb(float x)
@@ -95,6 +91,10 @@ float ldexp(float x, int e)
 {
 	return x * pow(2, e);
 }
+float logn(float x, float base)
+{
+	return log(x) / log(base);
+}
 float log10(float x)
 {
 	return log(x) * M_LOG10E;
@@ -156,11 +156,11 @@ vector lgamma(float x)
 		// gamma(1-z) * gamma(z) = pi / sin(pi*z)
 		// lgamma(1-z) + lgamma(z) = log(pi) - log(sin(pi*z))
 		// sign of gamma(1-z) = sign of gamma(z) * sign of sin(pi*z)
-		v_z = sin(M_PI * x);
-		v_x = log(M_PI) - log(fabs(v.z)) - v.x;
+		v.z = sin(M_PI * x);
+		v.x = log(M_PI) - log(fabs(v.z)) - v.x;
 		if(v.z < 0)
-			v_y = -v.y;
-		v_z = 0;
+			v.y = -v.y;
+		v.z = 0;
 		return v;
 	}
 	if(x < 1.1)
@@ -175,6 +175,20 @@ float tgamma(float x)
 	return exp(v.x) * v.y;
 }
 
+/**
+ * Pythonic mod:
+ * TODO: %% operator?
+ *
+ *  1 %  2 ==  1
+ * -1 %  2 ==  1
+ *  1 % -2 == -1
+ * -1 % -2 == -1
+ */
+float pymod(float x, float y)
+{
+	return x - y * floor(x / y);
+}
+
 float nearbyint(float x)
 {
 	return rint(x);
@@ -195,9 +209,9 @@ float remainder(float x, float y)
 vector remquo(float x, float y)
 {
 	vector v;
-	v_z = 0;
-	v_y = rint(x / y);
-	v_x = x - y * v.y;
+	v.z = 0;
+	v.y = rint(x / y);
+	v.x = x - y * v.y;
 	return v;
 }
 
@@ -276,3 +290,11 @@ int isunordered(float x, float y)
 {
 	return !(x < y || x == y || x > y);
 }
+
+vector cross(vector a, vector b)
+{
+	return
+		'1 0 0' * (a.y * b.z - a.z * b.y)
+	+	'0 1 0' * (a.z * b.x - a.x * b.z)
+	+	'0 0 1' * (a.x * b.y - a.y * b.x);
+}